new old stock box I found in my garage cupboard

stored for 30+ years

this is what I was able to find as far as crossover part numbers and manufacturers

appears to be for flathead Ford V-8 engines, makes sense as I owned a 1934 Ford for nearly 50 yers

Autolite 386
Champion 502
Champion CCH502
Champion D21
Champion D21013
Denso 5001
Denso L14-U
Denso L14-U/M14
Denso L14U
Denso M14
NGK 1010
NGK 2910
NGK AB-6
NGK AB6
NGK stk 2910

located in Scottsdale, AZ 85260

thank you your interest